grub2: remove GRUB2_ARCH_SUPPORTED

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

boot/grub2/grub2.mk

@@ -1,20 +1,3 @@
-GRUB2_SUPPORTED_ARCH=n
-ifeq ($(ARCH),i386)
-GRUB2_SUPPORTED_ARCH=y
-endif
-ifeq ($(ARCH),i486)
-GRUB2_SUPPORTED_ARCH=y
-endif
-ifeq ($(ARCH),i586)
-GRUB2_SUPPORTED_ARCH=y
-endif
-ifeq ($(ARCH),i686)
-GRUB2_SUPPORTED_ARCH=y
-endif
-ifeq ($(ARCH),x86_64)
-GRUB2_SUPPORTED_ARCH=y
-endif
-ifeq ($(GRUB2_SUPPORTED_ARCH),y)
 #############################################################
 #
 # grub2
@@ -122,8 +105,6 @@ grub2-clean:
 grub2-dirclean:
 	rm -rf $(GRUB2_DIR)
 
-endif
-
 #############################################################
 #
 # Toplevel Makefile options